Strip steel rolling control method and system, medium and single-rack reversible rolling mill

Abstract

The invention discloses a strip steel rolling control method and system, a medium and a single-stand reversible rolling mill, and the method comprises the following steps: when strip steel uncoiling drifting begins, controlling the rolling mill to run in a gradient descending manner; according to the unit rolling force of the strip steel, the roll bending force of a working roll in the single-rack reversible rolling mill is subjected to step control; when the belt tail is separated from the uncoiler, stop iron arranged on the operation side of the single-rack reversible rolling mill is matched with a proximity switch to detect the pressing state of the belt tail pressed by the band-type brake roller, and the tension of the band-type brake roller is adjusted by referring to the pressing state of the belt tail pressed by the band-type brake roller; a monitoring component installed between a straight head machine and a side guide is used for monitoring a strip tail in real time, a tracking sensor in the single-rack reversible rolling mill is triggered to track the running distance of the strip tail when the strip tail cannot be monitored, and after the running distance of the strip tail reaches a preset distance, the single-rack reversible rolling mill stops running.

Description

Technical Field

[0001] The present application relates to the technical field of steel rolling, and in particular to a strip steel rolling control method, system, medium and single-stand reversible rolling mill. Background Art

[0002] Single-stand reversing mills are primarily used to roll a variety of metal materials, including stainless steel, carbon steel, and nonferrous metals. Through the interaction of work and backup rolls, the rolls exert pressure on the strip, gradually thinning it during the reciprocating rolling process to achieve the target shape and dimensional accuracy. These mills are widely used in the production of high-precision sheet metal, such as stainless steel and silicon steel.

[0003] However, in actual rolling, uncoiler tail swinging can easily occur due to defects in uncoiler structure and tension control, inappropriate rolling process parameters, differences in strip characteristics, and poor coordination between equipment. Single-stand reversible rolling mills experience a loss of tension after tail swinging, leading to severe strip swing, loss of shape control, and even serious accidents such as strip wrinkling, strip leakage, and strip breakage. This not only reduces the strip yield but can also damage equipment and cause serious economic losses. Summary of the Invention

[0004] In order to solve or partially solve the technical problem of low plate yield of a single-stand reversible rolling mill caused by strip uncoiling and tail swinging, the present invention provides a strip rolling control method, system, medium and single-stand reversible rolling mill, which can realize tension-free stable rolling of the single-stand reversible rolling mill after tail swinging, improve product yield, reduce cutting loss and enhance product profitability.

[0005] In order to solve the above technical problems, the first aspect of the present invention discloses a rolling control method for a single-stand reversible rolling mill in a tension-free state, wherein the method is applied to the single-stand reversible rolling mill.

[0006] The uncoiler is located at the entrance end of the single-stand reversible rolling mill, the straightening machine is located after the uncoiler, the brake roller is located between the uncoiler and the straightening machine, and the side guides are installed on both sides of the entrance section of the single-stand reversible rolling mill. The method includes:

[0007] When the strip begins to unwind and swing out, the rolling mill speed is controlled to decrease gradually;

[0008] Controlling the bending force of the working rolls in the single-stand reversible rolling mill in stages according to the unit rolling force of the strip;

[0009] When the strip tail is released from the coiler, the brake roller is used to detect the pressing state of the strip tail by the brake roller in conjunction with the proximity switch provided on the operating side of the single-stand reversible rolling mill, and the tension of the brake roller is adjusted with reference to the pressing state of the strip tail by the brake roller;

[0010] A monitoring component installed between the straightening machine and the side guide is used to monitor the tail of the strip in real time, and when the tail of the strip cannot be detected, a tracking sensor in the single-stand reversible rolling mill is triggered to track the running distance of the tail of the strip. After the running distance of the tail of the strip reaches a preset distance, the single-stand reversible rolling mill stops running.

[0011] Optionally, after controlling the rolling mill operating speed gradient to decrease, the method further includes:

[0012] Real-time monitoring of strip thickness, strip deviation, and right-side tension difference;

[0013] If the strip thickness is less than a first thickness threshold, the strip offset exceeds an offset threshold, and the right tension difference exceeds a tension difference threshold, a rolling mill deviation alarm is triggered to stop.

[0014] Optionally, after controlling the rolling mill operating speed gradient to decrease, the method further includes:

[0015] Real-time monitoring of the number of remaining coils of the uncoiler;

[0016] If the remaining number of curling turns reaches a set threshold, the straightening machine is controlled to press down the strip.

[0017] Optionally, after controlling the rolling mill operating speed gradient to decrease, the method further includes:

[0018] The reduction rate of the entry roll system of the single-stand reversing rolling mill is adjusted.

[0019] Optionally, when the tail of the tape is released from the unwinder, the method further comprises:

[0020] Cut off the motor corresponding to the uncoiler.

[0021] Optionally, after the bending roll force of the working rolls in the single-stand reversible rolling mill is controlled in stages according to the unit rolling force of the strip, the method further comprises:

[0022] When the single-stand reversible rolling mill performs left-side strip threading preparation, the brake roller is controlled to be in a pressed state, and the retraction reference limit value of the brake roller is lowered.

[0023] Optionally, after controlling the bending roll force of the working rolls in the single-stand reversible rolling mill in stages according to the unit rolling force of the strip steel, the method further comprises:

[0024] When the single-stand reversible rolling mill performs left-side strip threading preparation, the brake roller is controlled to be in a pressed state, and the retraction reference limit value of the brake roller is lowered.

[0025] A second aspect of the present invention discloses a strip rolling control system, which is applied to a single-stand reversing rolling mill, wherein an uncoiler is located at the entrance end of the single-stand reversing rolling mill, a straightening machine is located after the uncoiler, a brake roller is located between the uncoiler and the straightening machine, and side guides are installed on both sides of the entrance section of the single-stand reversing rolling mill. The system includes:

[0026] The first control module is used to control the rolling mill running speed gradient to decrease when the strip uncoiling and tail swinging begin;

[0027] A second control module is used to perform step-by-step control on the bending force of the working rolls in the single-stand reversible rolling mill according to the unit rolling force of the strip;

[0028] an adjustment module for detecting, when the strip tail detaches from the coiler, a pressing state of the strip tail by the brake roller by using a stop iron provided on the operating side of the single-stand reversible rolling mill in conjunction with a proximity switch, and adjusting the tension of the brake roller with reference to the pressing state of the strip tail by the brake roller;

[0029] The monitoring module is used to monitor the strip tail in real time using a monitoring component installed between the straightening machine and the side guide, and trigger the tracking sensor in the single-stand reversible rolling mill to track the running distance of the strip tail when the strip tail cannot be detected. After the running distance of the strip tail reaches a preset distance, the single-stand reversible rolling mill stops running.

[0030] According to a third aspect of the present invention, a computer-readable storage medium is disclosed, on which a computer program is stored. When the program is executed by a processor, the steps of the above method are implemented.

[0031] The fourth aspect of the present invention discloses a single-stand reversible rolling mill, comprising: a uncoiler, a brake roller, a straightening machine, a guide position and a main controller, wherein the uncoiler is located at the entrance end of the single-stand reversible rolling mill, the straightening machine is located after the uncoiler, the brake roller is located between the uncoiler and the straightening machine, and the side guide position is installed on both sides of the entrance section of the single-stand reversible rolling mill. It is characterized in that the main controller in the single-stand reversible rolling mill implements the steps of the above method when executing the program.

[0032] Through one or more technical solutions of the present invention, the present invention has the following beneficial effects or advantages:

[0033] The technical solution disclosed in the present invention controls the rolling mill's operating speed to decrease gradually when the strip begins to unwind and swing out. During the rolling mill's swing-out deceleration phase, the bending force of the working rolls in the single-stand reversible mill is controlled in stages based on the strip's unit rolling force, so that the degree of bending of the working rolls changes with the unit rolling force. This ensures stable rolling by increasing dynamic control of the rolling force during the swing-out rolling process. When the strip tail detaches from the unwinder, a stop iron provided on the operating side cooperates with a proximity switch to detect the state of the brake roller pressing down on the strip tail. The brake roller's tension is adjusted based on this state to reduce the oscillation of the strip in the tension-free state. Furthermore, a monitoring component is added during the swing-out phase, which monitors the strip in real time using the monitoring component installed between the straightening machine and the side guide. If the strip cannot be detected, a tracking sensor in the single-stand reversible mill is triggered to track the strip tail's travel distance. The tracking sensor then controls the mill to precisely stop the strip when the strip tail reaches a preset distance. The above solution can realize tension-free stable rolling of a single-stand reversible rolling mill after tail swinging, improve the stable control level of the production line, reduce downtime, reduce the waste of raw materials, and increase the production line output and product profitability.

[0034] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0036] Figure 1 A schematic diagram showing the positions of an uncoiler and a single-stand reversible rolling mill according to an embodiment of the present invention is shown;

[0037] Figure 2 A flow chart of a strip rolling control method according to an embodiment of the present invention is shown;

[0038] Figure 3 A schematic diagram of a strip rolling control system according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0039] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0040] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0041] In a first aspect, embodiments of the present invention provide a strip rolling control method. The method is applied to a single-stand reversing rolling mill. The single-stand reversing rolling mill of the present invention is exemplified by an 18-high single-stand reversing rolling mill, but this is not intended to be limiting.

[0042] See Figure 1 , is a schematic diagram of the location of the uncoiler and single-stand reversing rolling mill.

[0043] In a single-stand reversing rolling mill, the uncoiler is located at the inlet end of the unit and its function is to support and rotate the steel coil to provide strip steel for rolling.

[0044] The straightening machine is located after the uncoiler and is used to straighten the strip head so that it can enter the subsequent equipment smoothly.

[0045] The brake roller is usually located between the uncoiler and the straightening machine, or near the uncoiler. It is mainly used to brake the reel of the uncoiler when necessary to control the tension and movement of the strip.

[0046] The side guides are installed on both sides of the rolling mill entrance section to guide and position the strip laterally, ensuring that the strip maintains the correct position during the rolling process.

[0047] Based on the above structure, see below Figure 2 The present invention provides a strip rolling control method comprising at least the following steps:

[0048] S201, when the strip begins to unwind and swing out, the rolling mill speed is controlled to decrease gradually.

[0049] Among them, strip tail swinging refers to an undesirable phenomenon in which the tail of the strip swings, deviates from the normal operating trajectory, and other irregular movements during the process of the uncoiler unwinding the strip from the steel coil due to factors such as defects in the uncoiler structure and tension control, unreasonable rolling process parameters, differences in the strip's own characteristics, and poor coordination between equipment. This can easily lead to a single-stand reversible rolling mill being in a state of loss of tension after the strip tail swinging.

[0050] Therefore, in order to achieve tension-free stable rolling after tail swinging of a single-stand reversible rolling mill, the tail swinging control logic is optimized when the strip uncoiling and tail swinging begin, and the rolling mill operating speed is controlled to decrease with reference to the speed control parameter gradient to prepare for subsequent control.

[0051] As an optional implementation, after the mill's operating speed is controlled to decrease, a mill deviation alarm and shutdown function is triggered. Within the mill deviation alarm and shutdown logic, strip thickness, strip offset, and right-side tension difference are monitored in real time. If the strip thickness is less than a first thickness threshold, the strip offset exceeds an offset threshold, and the right-side tension difference exceeds a tension difference threshold, a mill deviation alarm and shutdown function is triggered. For example, if the monitored strip thickness is less than 1.0 mm, the strip offset exceeds 14 mm, and the right-side tension difference exceeds 10%, a mill deviation alarm and shutdown function is triggered. This prevents strip breakage caused by strip deviation and ensures safe and stable mill operation.

[0052] As an optional implementation, after controlling the rolling mill's speed gradient, the straightening machine is also activated, modifying its control strategy. Specifically, the straightening machine monitors the remaining coils on the uncoiler in real time. If the remaining coils reach a set threshold, the straightening machine is controlled to lower the strip. For example, if strip tailing is detected and there are nine coils remaining on the uncoiler, the straightening machine is controlled to lower the strip.

[0053] In an optional embodiment, the reduction ratio is also optimized. Specifically, after controlling the rolling mill's operating speed gradient to decrease, the reduction ratio of the entry roll system of the single-stand reversing mill is adjusted, for example, by increasing the reduction ratio. This approach can increase the roughness and ensure that the strip tail does not slip. Of course, voice prompts can also be used to optimize the control mode.

[0054] S202: Controlling the bending force of the working rolls in the single-stand reversible rolling mill in stages according to the unit rolling force of the strip steel.

[0055] Specifically, since poor plate shape during the rolling process and double-sided waves at the tail of the finished steel coil are prone to occur in the tail deceleration stage, the rolling control needs to be optimized at this stage to improve the plate shape quality.

[0056] In the specific optimization process, the bending roll force of the working roll in the single-stand reversible rolling mill is graded according to the unit rolling force of the strip, a piecewise linear function is established according to the grade, and a corresponding bending roll force value is set for each pressure grade so that the bending degree of the working roll changes with the change of the unit rolling force. The problems of poor plate shape and double-side wave are improved by precise control of the bending roll force.

[0057] In an optional embodiment, the brake roller can switch between a depressed and retracted state, and this switching is based on a retraction reference limit. Typically, the retraction reference limit depends on the strip thickness. For example, the retraction reference limit is set at 1.5 mm. If the measured strip thickness is less than 1.5 mm, the brake roller is automatically retracted. However, due to varying strip specifications, this retraction reference limit can easily cause thin strip to unwind on the right coiler when rolling thin gauges. Therefore, when the single-stand reversing mill is preparing for left-side strip threading, the brake roller is controlled to be depressed, and the retraction reference limit is lowered. For example, the retraction reference limit is changed from 1.5 mm to 0.5 mm. This design ensures that the brake roller is always depressed during strip threading preparation, ensuring that the strip does not unwind on the right coiler, maintaining normal production line operation, improving operational efficiency, saving production time, and reducing the possibility of accidents.

[0058] S203, when the strip tail is separated from the coiler, the brake roller is used to detect the pressing state of the strip tail by the brake roller in conjunction with the proximity switch provided on the operating side of the single-stand reversible rolling mill, and the tension of the brake roller is adjusted with reference to the pressing state of the strip tail by the brake roller.

[0059] In this embodiment, a brake roller input control is added, wherein the brake roller is provided at the entrance of the rolling mill stand.

[0060] When the production line produces the first strip, if the tail of the strip escapes from the coiler, the brake roller is controlled to press down, clamping the strip to provide tension, thereby ensuring normal rolling of the tail of the strip.

[0061] The brake roller's depressed state is detected by a stop iron coupled with a proximity switch. Specifically, when the brake roller is depressed, the stop iron moves into the proximity switch's detection range, triggering the proximity switch to indicate the roller is depressed. This allows the system to perform appropriate control and operation, ensuring correct strip tension control during rolling, ensuring proper rolling of the strip tail, and improving yield rates.

[0062] However, in actual practice, since the iron stop is designed on the drive side of the single-stand reversible rolling mill and there are many oil pipes around it, errors in the brake roller status detection often occur, affecting the strip yield rate and even causing the strip tail to run off track and break, resulting in damage to the roller, seriously affecting the smooth operation of the production line.

[0063] To accurately detect the brake roller status, the stop iron position has been moved from the drive side to the operator side of a single-stand reversing mill, reducing obstruction by other components. Notably, after the stop iron is moved to the operator side of the mill, its operating principle remains unchanged; it continues to follow the movement of the brake roller. Conversely, the position of the detection switch can follow the movement, or the detection switch model can be optimized to use one with a longer detection range and larger detection area. These improvements significantly improve the accuracy of brake roller status detection. Furthermore, if anomalies such as non-detection or false detection occur, personnel can quickly address them. For example, if the proximity switch fails to detect the stop iron signal, personnel can quickly check the stop iron position and whether the proximity switch is damaged, allowing for timely adjustments or repairs. This prevents serious problems such as strip tail deviation, strip breakage, and roller damage caused by inaccurate brake roller position detection, ensuring smooth and stable production line operation and improving strip yield and productivity.

[0064] Furthermore, the brake roller's depression state includes the depression position and depression amount. Furthermore, the brake roller tension is adjusted based on the brake roller's depression position and depression amount. Generally, the deeper the depression position, the greater the depression amount, and the greater the pressure on the strip. Using a preset control algorithm and parameters, the brake roller's depression position and depression amount are processed to obtain adjustment information for the brake roller's drive device, such as the motor current or hydraulic system pressure. This allows the brake roller tension to be adjusted to suit different production process requirements and strip operating conditions, ensuring strip stability and quality during rolling.

[0065] In an optional embodiment, to accurately detect the depressed state of the brake roller, a detection is performed in conjunction with the hydraulic cylinder pressure based on the above. Specifically, the contact result between the stop iron and the proximity switch and the hydraulic cylinder pressure are detected. If the contact result indicates that the stop iron and the proximity switch are in contact and the hydraulic cylinder pressure reaches a set pressure threshold, the brake roller is determined to be in the depressed state. For example, if the stop iron and the proximity switch are in contact and the hydraulic cylinder pressure reaches 140 bar, the brake roller is determined to be in the depressed state.

[0066] The brake roller's depression state is correlated with strip tension. Generally, the deeper the depression, the greater the pressure on the strip, which in turn increases the strip tension to a certain extent. By detecting the brake roller's depression position, the control system can obtain information about the current degree of depression. Based on this information, the control system adjusts the brake roller's drive mechanism (such as motor current or hydraulic system pressure) according to pre-set control algorithms and parameters. This adjusts the brake roller tension to suit varying production process requirements and strip operating conditions, ensuring strip stability and quality during rolling.

[0067] In an optional embodiment, the uncoiler itself is optimized, taking into account that when the uncoiler is tail-swinging, the strip will separate from the core shaft, and the core shaft will slowly reverse and switch the direction of rotation. In a short period of time, the torque will reach -100% and 100% respectively, which may easily cause unnecessary damage to the transmission power components and mechanical structure.

[0068] Specifically, when the tail of the strip escapes the coiler, indicating the end of the coiler's tail swing, the corresponding motor of the coiler is shut off, causing the coiler to stop immediately. Furthermore, disconnecting the coiler from the control of the current channel and braking the coiler's mandrel can also reduce damage to the mandrel caused by steering.

[0069] S204, using a monitoring component installed between the straightening machine and the side guide to monitor the tail of the strip in real time, and triggering a tracking sensor in the single-stand reversible rolling mill to track the running distance of the tail of the strip when the tail of the strip cannot be detected. After the running distance of the tail of the strip reaches a preset distance, the single-stand reversible rolling mill stops running.

[0070] Specifically, a mounting bracket is provided between the straightening machine and the side guide for mounting a monitoring component, wherein the monitoring component is exemplified as a grating and the tracking sensor is exemplified as a tracking encoder, but this is not intended to be limiting.

[0071] When the strip tail begins to swing out during uncoiling, a light barrier is triggered to activate. The light barrier detects the strip tail. If the light barrier cannot detect the strip, indicating that the strip tail has just passed the light barrier, the motor encoder is triggered to begin tracking the strip's travel distance. Furthermore, when the strip tail passes a preset distance of 2.9 meters, the single-stand reversible mill is stopped for a precise stop. This allows for precise control of the strip's rolled length, prevents it from swinging past the mill, improves thickness uniformity across the coil, and increases yield rates.

[0072] When this technical solution is actually implemented, the yield rate can be increased by 0.5%, the monthly output can be 20,000 tons, the efficiency per ton of steel can be increased by 1,000 yuan, and the annual benefit can reach: 0.5% × 20,000 tons × 1,000 yuan × 12 months = 1.2 million yuan.

[0073] In the second aspect, based on the same inventive concept as the strip rolling control method provided in the embodiment of the first aspect, the embodiment of the present invention further provides a strip rolling control system, which is applied to a single-stand reversible rolling mill. In the single-stand reversible rolling mill, the uncoiler is located at the entrance end of the single-stand reversible rolling mill, the straightening machine is located after the uncoiler, the brake roller is located between the uncoiler and the straightening machine, and the side guides are installed on both sides of the entrance section of the single-stand reversible rolling mill. For specific structure, see Figure 1 , I will not go into details here.

[0074] See Figure 3 , the strip steel rolling control system of the present invention comprises:

[0075] The first control module 301 is used to control the rolling mill running speed gradient to decrease when the strip uncoiling and tail swinging begin;

[0076] A second control module 302 is configured to perform step-by-step control on the bending force of the work rolls in the single-stand reversible rolling mill according to the unit rolling force of the strip;

[0077] an adjustment module 303 for detecting, when the strip tail detaches from the coiler, a pressing state of the strip tail by the brake roller by using a stop iron provided on the operating side of the single-stand reversible rolling mill in conjunction with a proximity switch, and adjusting the tension of the brake roller with reference to the pressing state of the strip tail by the brake roller;

[0078] The monitoring module 304 is used to monitor the tail of the strip in real time using a monitoring component installed between the straightening machine and the side guide, and trigger the tracking sensor in the single-stand reversible rolling mill to track the running distance of the tail of the strip when the tail of the strip cannot be detected. After the running distance of the tail of the strip reaches a preset distance, the single-stand reversible rolling mill stops running.

[0079] In an optional embodiment, the system further includes an alarm module, configured to:

[0080] Real-time monitoring of strip thickness, strip deviation, and right-side tension difference;

[0081] If the strip thickness is less than a first thickness threshold, the strip offset exceeds an offset threshold, and the right tension difference exceeds a tension difference threshold, a rolling mill deviation alarm is triggered to stop.

[0082] In an optional embodiment, the control system further includes a third control module, configured to:

[0083] Real-time monitoring of the number of remaining coils of the uncoiler;

[0084] If the remaining number of curling turns reaches a set threshold, the straightening machine is controlled to press down the strip.

[0085] In an optional implementation, the adjustment module 303 is further configured to:

[0086] The reduction rate of the entry roll system of the single-stand reversing rolling mill is adjusted.

[0087] In an optional embodiment, the system further includes a power-off control module for cutting off the motor corresponding to the uncoiler.

[0088] In an optional embodiment, the system further includes a fourth control module, configured to:

[0089] When the single-stand reversible rolling mill performs left-side strip threading preparation, the brake roller is controlled to be in a pressed state, and the retraction reference limit value of the brake roller is lowered.

[0090] In an optional implementation, the adjustment module 303 is specifically configured to:

[0091] detecting the contact result between the stop iron and the proximity switch and the pressure of the hydraulic cylinder;

[0092] If the contact result indicates that the stop iron is in contact with the proximity switch and the pressure of the hydraulic cylinder reaches a set pressure threshold, it is determined that the brake roller is in the depressed state.

[0093] It should be noted that the strip rolling control system provided by the embodiment of the present invention, in which the specific manner in which each module performs operations has been described in detail in the method embodiment provided in the above-mentioned first aspect. The specific implementation process can refer to the method embodiment provided in the above-mentioned first aspect, and will not be elaborated here.

[0094] In the third aspect, based on the same inventive concept as the strip rolling control method provided in the embodiment of the first aspect mentioned above, the embodiment of the present invention also discloses a computer-readable storage medium on which a computer program is stored, which implements the steps of any of the methods described above when executed by a processor.

[0095] In the fourth aspect, based on the same inventive concept as the strip rolling control method provided in the embodiment of the first aspect mentioned above, the embodiment of the present invention also discloses a single-stand reversible rolling mill, including: a uncoiler, a brake roller, a straightening machine, a guide position and a main controller, wherein the uncoiler is located at the entrance end of the single-stand reversible rolling mill, the straightening machine is located after the uncoiler, the brake roller is located between the uncoiler and the straightening machine, and the side guide position is installed on both sides of the entrance section of the single-stand reversible rolling mill, wherein the main controller in the single-stand reversible rolling mill implements the steps of any of the methods described above when executing the program.

[0096] Through one or more embodiments of the present invention, the present invention has the following beneficial effects or advantages:

[0097] The technical solution disclosed in the present invention controls the rolling mill's operating speed to decrease gradually when the strip begins to unwind and swing out. During the rolling mill's swing-out deceleration phase, the bending force of the work rolls in the single-stand reversible mill is controlled in stages based on the strip's unit rolling force, so that the degree of bending of the work rolls changes with the unit rolling force. This ensures stable rolling by increasing dynamic control of the rolling force during the swing-out rolling process. When the strip tail detaches from the unwinder, a stop iron provided on the operating side cooperates with a proximity switch to detect the pressure of the brake roller on the strip tail. The brake roller tension is adjusted based on this pressure to reduce the oscillation of the strip in the tension-free state. Furthermore, a monitoring component is added during the swing-out phase. The monitoring component, installed between the straightening machine and the side guide, monitors the strip in real time. If the strip cannot be detected, a tracking sensor in the single-stand reversible mill is triggered to track the strip tail's travel distance. The tail tail is then precisely stopped when the tail reaches a preset distance. The above solution can realize tension-free stable rolling of a single-stand reversible rolling mill after tail swinging, improve the stable control level of the production line, reduce downtime, reduce the waste of raw materials, and increase the production line output and product profitability.

[0098] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0099] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A strip rolling control method, the method being applied to a single-stand reversible rolling mill, wherein the uncoiler is located at the inlet end of the single-stand reversible rolling mill, the straightening machine is located after the uncoiler, the brake roller is located between the uncoiler and the straightening machine, and side guides are installed on both sides of the inlet section of the single-stand reversible rolling mill, characterized in that: The method comprises: When the strip begins to unwind and swing out, the rolling mill speed is controlled to decrease gradually; Controlling the bending force of the working rolls in the single-stand reversible rolling mill in stages according to the unit rolling force of the strip; When the strip tail is released from the coiler, the brake roller is used to detect the pressing state of the strip tail by the brake roller in conjunction with the proximity switch provided on the operating side of the single-stand reversible rolling mill, and the tension of the brake roller is adjusted with reference to the pressing state of the strip tail by the brake roller; A monitoring component installed between the straightening machine and the side guide is used to monitor the tail of the strip in real time, and when the tail of the strip cannot be detected, a tracking sensor in the single-stand reversible rolling mill is triggered to track the running distance of the tail of the strip. After the running distance of the tail of the strip reaches a preset distance, the single-stand reversible rolling mill stops running.

2. The method according to claim 1, wherein After controlling the rolling mill running speed gradient to decrease, the method further includes: Real-time monitoring of strip thickness, strip deviation, and right-side tension difference; If the strip thickness is less than a first thickness threshold, the strip offset exceeds an offset threshold, and the right tension difference exceeds a tension difference threshold, a rolling mill deviation alarm is triggered to stop.

3. The method according to claim 1, wherein After controlling the rolling mill running speed gradient to decrease, the method further includes: Real-time monitoring of the number of remaining coils of the uncoiler; If the remaining number of curling turns reaches a set threshold, the straightening machine is controlled to press down the strip.

4. The method according to claim 1, wherein After controlling the rolling mill running speed gradient to decrease, the method further includes: The reduction rate of the entry roll system of the single-stand reversing rolling mill is adjusted.

5. The method according to claim 1, wherein When the tail of the tape is released from the reel, the method further comprises: Cut off the motor corresponding to the uncoiler.

6. The method according to claim 1, wherein After the bending roll force of the working rolls in the single-stand reversible rolling mill is controlled in stages according to the unit rolling force of the strip, the method further comprises: When the single-stand reversible rolling mill performs left-side strip threading preparation, the brake roller is controlled to be in a pressed state, and the retraction reference limit value of the brake roller is lowered.

7. The method according to claim 1, wherein The method of detecting the pressing state of the strip tail by the brake roller by using the iron stop provided on the operating side of the single-stand reversible rolling mill in conjunction with a proximity switch specifically includes: detecting the contact result between the stop iron and the proximity switch and the pressure of the hydraulic cylinder; If the contact result indicates that the stop iron is in contact with the proximity switch and the pressure of the hydraulic cylinder reaches a set pressure threshold, it is determined that the brake roller is in the depressed state.

8. A strip rolling control system, the system being applied to a single-stand reversible rolling mill, wherein the uncoiler is located at the inlet end of the single-stand reversible rolling mill, the straightening machine is located after the uncoiler, the brake roller is located between the uncoiler and the straightening machine, and the side guides are installed on both sides of the inlet section of the single-stand reversible rolling mill, characterized in that: The system comprises: The first control module is used to control the rolling mill running speed gradient to decrease when the strip uncoiling and tail swinging begin; A second control module is used to perform step-by-step control on the bending force of the working rolls in the single-stand reversible rolling mill according to the unit rolling force of the strip; an adjustment module for detecting, when the strip tail detaches from the coiler, a pressing state of the strip tail by the brake roller by using a stop iron provided on the operating side of the single-stand reversible rolling mill in conjunction with a proximity switch, and adjusting the tension of the brake roller with reference to the pressing state of the strip tail by the brake roller; The monitoring module is used to monitor the strip tail in real time using a monitoring component installed between the straightening machine and the side guide, and trigger the tracking sensor in the single-stand reversible rolling mill to track the running distance of the strip tail when the strip tail cannot be detected. After the running distance of the strip tail reaches a preset distance, the single-stand reversible rolling mill stops running.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A single-stand reversible rolling mill comprising: An uncoiler, a brake roller, a straightening machine, a guide measuring position and a main controller, wherein the uncoiler is located at the entrance end of a single-stand reversible rolling mill, the straightening machine is located after the uncoiler, the brake roller is located between the uncoiler and the straightening machine, and the side guides are installed on both sides of the entrance section of the single-stand reversible rolling mill. It is characterized in that the main controller in the single-stand reversible rolling mill implements the steps of the method described in any one of claims 1 to 7 when executing the program.

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